loss boost issue

[nicknguyenle]

everything was perfect after last night, my car lose boost. My boost used to be at 15-16.5 psi at wot. Right now, maximum is ~9.5 psi. I took it to the shop and check for boost leak ===> no sign of leaking. Turbo no smoking, replace new EBCS but wont help. I tried different maps, and even restored to stock map but no help. It still got under boost. My car right now got CS SRI and TIP. HPFP and Cobb AP. i attached log csv file, so anyone could help with my problem ?

 

[Littleloogy]

Looks like you are loosing Air somewhere. You AFR’s are extremely rich when you are WOT. Your WGDC looks like it’s pegged as much at the tune allows.

My suggestion is to do a boost leak test. Which involves actually pressurizing your system up and testing to see where you are loosing air.


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